fix empty quota list

diff --git a/teleforma/exam/admin.py b/teleforma/exam/admin.py
index 1bd6ab0ec820de41f7d73dbb915eefcc687bbb9a..ea196142aaebbb3c2e87cd4939dd716f947bc320 100644 (file)
--- a/teleforma/exam/admin.py
+++ b/teleforma/exam/admin.py
@@ -22,7 +22,10 @@ class QuotaAdmin(admin.ModelAdmin):
          return super(QuotaAdmin, self).render_change_form(request, context, *args, **kwargs)
 
     def corrector_name(self, instance):
-        return instance.corrector.last_name + ' ' + instance.corrector.first_name
+        if instance.corrector:
+            return instance.corrector.last_name + ' ' + instance.corrector.first_name
+        else:
+            return "---"
 
 
 class ScriptPageInline(admin.StackedInline):